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Finding the Fourth Proportional to 223.79, 308.07 and 161.51

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Solution

The fourth proportional to 223.79, 308.07 and 161.51 is: 222.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.79 : 308.07 = 161.51 : x
  2. Step 2: Convert to fraction form
    223.79/308.07 = 161.51/x
  3. Step 3: Cross multiply
    223.79x = 308.07 × 161.51
  4. Step 4: Simplify right side
    223.79x = 49,754.85
  5. Step 5: Solve for x
    x = 49,754.85/223.79
  6. Step 6: Final answer
    x = 222.33

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.